2251445145 has 32 divisors (see below), whose sum is σ = 3658141440. Its totient is φ = 1182209280.

The previous prime is 2251445129. The next prime is 2251445149. The reversal of 2251445145 is 5415441522.

It is a happy number.

It is not a de Polignac number, because 2251445145 - 2⁴ = 2251445129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2251445149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1316551 + ... + 1318259.

It is an arithmetic number, because the mean of its divisors is an integer number (114316920).

Almost surely, 2^2251445145 is an apocalyptic number.

It is an amenable number.

2251445145 is a deficient number, since it is larger than the sum of its proper divisors (1406696295).

2251445145 is a wasteful number, since it uses less digits than its factorization.

2251445145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025.

The product of its digits is 32000, while the sum is 33.

The square root of 2251445145 is about 47449.3956231268. The cubic root of 2251445145 is about 1310.6511816049.

Adding to 2251445145 its reverse (5415441522), we get a palindrome (7666886667).

The spelling of 2251445145 in words is "two billion, two hundred fifty-one million, four hundred forty-five thousand, one hundred forty-five".